Libav
matroskadec.c
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1 /*
2  * Matroska file demuxer
3  * Copyright (c) 2003-2008 The Libav Project
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
31 #include "config.h"
32 
33 #include <inttypes.h>
34 #include <stdio.h>
35 #if CONFIG_BZLIB
36 #include <bzlib.h>
37 #endif
38 #if CONFIG_ZLIB
39 #include <zlib.h>
40 #endif
41 
42 #include "libavutil/avstring.h"
43 #include "libavutil/dict.h"
44 #include "libavutil/intfloat.h"
45 #include "libavutil/intreadwrite.h"
46 #include "libavutil/lzo.h"
47 #include "libavutil/mathematics.h"
48 
49 #include "libavcodec/bytestream.h"
50 #include "libavcodec/flac.h"
51 #include "libavcodec/mpeg4audio.h"
52 
53 #include "avformat.h"
54 #include "avio_internal.h"
55 #include "internal.h"
56 #include "isom.h"
57 #include "matroska.h"
58 #include "oggdec.h"
59 /* For ff_codec_get_id(). */
60 #include "riff.h"
61 #include "rmsipr.h"
62 
63 typedef enum {
74 } EbmlType;
75 
76 typedef const struct EbmlSyntax {
77  uint32_t id;
81  union {
82  uint64_t u;
83  double f;
84  const char *s;
85  const struct EbmlSyntax *n;
86  } def;
87 } EbmlSyntax;
88 
89 typedef struct {
90  int nb_elem;
91  void *elem;
92 } EbmlList;
93 
94 typedef struct {
95  int size;
97  int64_t pos;
98 } EbmlBin;
99 
100 typedef struct {
101  uint64_t version;
102  uint64_t max_size;
103  uint64_t id_length;
104  char *doctype;
105  uint64_t doctype_version;
106 } Ebml;
107 
108 typedef struct {
109  uint64_t algo;
112 
113 typedef struct {
114  uint64_t scope;
115  uint64_t type;
118 
119 typedef struct {
120  double frame_rate;
121  uint64_t display_width;
122  uint64_t display_height;
123  uint64_t pixel_width;
124  uint64_t pixel_height;
125  uint64_t fourcc;
126  uint64_t stereo_mode;
128 
129 typedef struct {
130  double samplerate;
132  uint64_t bitdepth;
133  uint64_t channels;
134 
135  /* real audio header (extracted from extradata) */
141  int pkt_cnt;
142  uint64_t buf_timecode;
145 
146 typedef struct {
147  uint64_t num;
148  uint64_t uid;
149  uint64_t type;
150  char *name;
151  char *codec_id;
153  char *language;
154  double time_scale;
156  uint64_t flag_default;
157  uint64_t flag_forced;
161  uint64_t codec_delay;
162 
164  int64_t end_timecode;
166 } MatroskaTrack;
167 
168 typedef struct {
169  uint64_t uid;
170  char *filename;
171  char *mime;
173 
176 
177 typedef struct {
178  uint64_t start;
179  uint64_t end;
180  uint64_t uid;
181  char *title;
182 
185 
186 typedef struct {
187  uint64_t track;
188  uint64_t pos;
190 
191 typedef struct {
192  uint64_t time;
194 } MatroskaIndex;
195 
196 typedef struct {
197  char *name;
198  char *string;
199  char *lang;
200  uint64_t def;
202 } MatroskaTag;
203 
204 typedef struct {
205  char *type;
206  uint64_t typevalue;
207  uint64_t trackuid;
208  uint64_t chapteruid;
209  uint64_t attachuid;
211 
212 typedef struct {
215 } MatroskaTags;
216 
217 typedef struct {
218  uint64_t id;
219  uint64_t pos;
221 
222 typedef struct {
223  uint64_t start;
224  uint64_t length;
225 } MatroskaLevel;
226 
227 typedef struct {
228  uint64_t timecode;
231 
232 typedef struct {
234 
235  /* EBML stuff */
238  int level_up;
239  uint32_t current_id;
240 
241  uint64_t time_scale;
242  double duration;
243  char *title;
250 
251  /* byte position of the segment inside the stream */
252  int64_t segment_start;
253 
254  /* the packet queue */
258 
259  int done;
260 
261  /* What to skip before effectively reading a packet. */
264 
265  /* File has a CUES element, but we defer parsing until it is needed. */
267 
271 
272  /* File has SSA subtitles which prevent incremental cluster parsing. */
275 
276 typedef struct {
277  uint64_t duration;
278  int64_t reference;
279  uint64_t non_simple;
281 } MatroskaBlock;
282 
284  { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
285  { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
286  { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
287  { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
288  { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
291  { 0 }
292 };
293 
295  { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
296  { 0 }
297 };
298 
300  { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
302  { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
307  { 0 }
308 };
309 
311  { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
312  { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width) },
313  { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height) },
314  { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
315  { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
316  { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, fourcc) },
325  { 0 }
326 };
327 
329  { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
330  { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
332  { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
333  { 0 }
334 };
335 
339  { 0 }
340 };
341 
343  { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
344  { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
345  { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
347  { 0 }
348 };
349 
351  { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
352  { 0 }
353 };
354 
356  { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
358  { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
359  { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
361  { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
362  { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
363  { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
364  { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
365  { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
366  { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
367  { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
368  { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
369  { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
370  { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
380  { 0 }
381 };
382 
384  { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
385  { 0 }
386 };
387 
389  { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
390  { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
391  { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
392  { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
394  { 0 }
395 };
396 
398  { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
399  { 0 }
400 };
401 
403  { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
405  { 0 }
406 };
407 
409  { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
410  { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
411  { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
412  { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
417  { 0 }
418 };
419 
421  { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
426  { 0 }
427 };
428 
430  { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
431  { 0 }
432 };
433 
435  { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
438  { 0 }
439 };
440 
442  { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
443  { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
444  { 0 }
445 };
446 
448  { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
449  { 0 }
450 };
451 
453  { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
454  { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
455  { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
456  { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
457  { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
458  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
459  { 0 }
460 };
461 
463  { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
464  { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
465  { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
466  { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
467  { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
468  { 0 }
469 };
470 
472  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
473  { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
474  { 0 }
475 };
476 
478  { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
479  { 0 }
480 };
481 
483  { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
484  { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
485  { 0 }
486 };
487 
489  { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
490  { 0 }
491 };
492 
494  { MATROSKA_ID_INFO, EBML_NEST, 0, 0, { .n = matroska_info } },
495  { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, { .n = matroska_tracks } },
496  { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, { .n = matroska_attachments } },
497  { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, { .n = matroska_chapters } },
498  { MATROSKA_ID_CUES, EBML_NEST, 0, 0, { .n = matroska_index } },
499  { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, { .n = matroska_tags } },
500  { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, { .n = matroska_seekhead } },
502  { 0 }
503 };
504 
506  { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
507  { 0 }
508 };
509 
511  { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
512  { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
514  { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock, reference) },
516  { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
517  { 0 }
518 };
519 
521  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
522  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
523  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
526  { 0 }
527 };
528 
530  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
535  { 0 }
536 };
537 
539  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
540  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
541  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
549  { 0 }
550 };
551 
553  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
558  { 0 }
559 };
560 
562  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
567  { 0 }
568 };
569 
570 static const char *const matroska_doctypes[] = { "matroska", "webm" };
571 
572 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
573 {
574  AVIOContext *pb = matroska->ctx->pb;
575  uint32_t id;
576  matroska->current_id = 0;
577  matroska->num_levels = 0;
578 
579  /* seek to next position to resync from */
580  if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
581  goto eof;
582 
583  id = avio_rb32(pb);
584 
585  // try to find a toplevel element
586  while (!pb->eof_reached) {
587  if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
588  id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
590  id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
591  matroska->current_id = id;
592  return 0;
593  }
594  id = (id << 8) | avio_r8(pb);
595  }
596 
597 eof:
598  matroska->done = 1;
599  return AVERROR_EOF;
600 }
601 
602 /*
603  * Return: Whether we reached the end of a level in the hierarchy or not.
604  */
606 {
607  AVIOContext *pb = matroska->ctx->pb;
608  int64_t pos = avio_tell(pb);
609 
610  if (matroska->num_levels > 0) {
611  MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
612  if (pos - level->start >= level->length || matroska->current_id) {
613  matroska->num_levels--;
614  return 1;
615  }
616  }
617  return 0;
618 }
619 
620 /*
621  * Read: an "EBML number", which is defined as a variable-length
622  * array of bytes. The first byte indicates the length by giving a
623  * number of 0-bits followed by a one. The position of the first
624  * "one" bit inside the first byte indicates the length of this
625  * number.
626  * Returns: number of bytes read, < 0 on error
627  */
629  int max_size, uint64_t *number)
630 {
631  int read = 1, n = 1;
632  uint64_t total = 0;
633 
634  /* The first byte tells us the length in bytes - avio_r8() can normally
635  * return 0, but since that's not a valid first ebmlID byte, we can
636  * use it safely here to catch EOS. */
637  if (!(total = avio_r8(pb))) {
638  /* we might encounter EOS here */
639  if (!pb->eof_reached) {
640  int64_t pos = avio_tell(pb);
641  av_log(matroska->ctx, AV_LOG_ERROR,
642  "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
643  pos, pos);
644  return pb->error ? pb->error : AVERROR(EIO);
645  }
646  return AVERROR_EOF;
647  }
648 
649  /* get the length of the EBML number */
650  read = 8 - ff_log2_tab[total];
651  if (read > max_size) {
652  int64_t pos = avio_tell(pb) - 1;
653  av_log(matroska->ctx, AV_LOG_ERROR,
654  "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
655  (uint8_t) total, pos, pos);
656  return AVERROR_INVALIDDATA;
657  }
658 
659  /* read out length */
660  total ^= 1 << ff_log2_tab[total];
661  while (n++ < read)
662  total = (total << 8) | avio_r8(pb);
663 
664  *number = total;
665 
666  return read;
667 }
668 
675  uint64_t *number)
676 {
677  int res = ebml_read_num(matroska, pb, 8, number);
678  if (res > 0 && *number + 1 == 1ULL << (7 * res))
679  *number = 0xffffffffffffffULL;
680  return res;
681 }
682 
683 /*
684  * Read the next element as an unsigned int.
685  * 0 is success, < 0 is failure.
686  */
687 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
688 {
689  int n = 0;
690 
691  if (size > 8)
692  return AVERROR_INVALIDDATA;
693 
694  /* big-endian ordering; build up number */
695  *num = 0;
696  while (n++ < size)
697  *num = (*num << 8) | avio_r8(pb);
698 
699  return 0;
700 }
701 
702 /*
703  * Read the next element as a float.
704  * 0 is success, < 0 is failure.
705  */
706 static int ebml_read_float(AVIOContext *pb, int size, double *num)
707 {
708  if (size == 0)
709  *num = 0;
710  else if (size == 4)
711  *num = av_int2float(avio_rb32(pb));
712  else if (size == 8)
713  *num = av_int2double(avio_rb64(pb));
714  else
715  return AVERROR_INVALIDDATA;
716 
717  return 0;
718 }
719 
720 /*
721  * Read the next element as an ASCII string.
722  * 0 is success, < 0 is failure.
723  */
724 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
725 {
726  char *res;
727 
728  /* EBML strings are usually not 0-terminated, so we allocate one
729  * byte more, read the string and NULL-terminate it ourselves. */
730  if (!(res = av_malloc(size + 1)))
731  return AVERROR(ENOMEM);
732  if (avio_read(pb, (uint8_t *) res, size) != size) {
733  av_free(res);
734  return AVERROR(EIO);
735  }
736  (res)[size] = '\0';
737  av_free(*str);
738  *str = res;
739 
740  return 0;
741 }
742 
743 /*
744  * Read the next element as binary data.
745  * 0 is success, < 0 is failure.
746  */
747 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
748 {
749  av_free(bin->data);
750  if (!(bin->data = av_mallocz(length + FF_INPUT_BUFFER_PADDING_SIZE)))
751  return AVERROR(ENOMEM);
752 
753  bin->size = length;
754  bin->pos = avio_tell(pb);
755  if (avio_read(pb, bin->data, length) != length) {
756  av_freep(&bin->data);
757  return AVERROR(EIO);
758  }
759 
760  return 0;
761 }
762 
763 /*
764  * Read the next element, but only the header. The contents
765  * are supposed to be sub-elements which can be read separately.
766  * 0 is success, < 0 is failure.
767  */
768 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
769 {
770  AVIOContext *pb = matroska->ctx->pb;
772 
773  if (matroska->num_levels >= EBML_MAX_DEPTH) {
774  av_log(matroska->ctx, AV_LOG_ERROR,
775  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
776  return AVERROR(ENOSYS);
777  }
778 
779  level = &matroska->levels[matroska->num_levels++];
780  level->start = avio_tell(pb);
781  level->length = length;
782 
783  return 0;
784 }
785 
786 /*
787  * Read signed/unsigned "EBML" numbers.
788  * Return: number of bytes processed, < 0 on error
789  */
791  uint8_t *data, uint32_t size, uint64_t *num)
792 {
793  AVIOContext pb;
794  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
795  return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
796 }
797 
798 /*
799  * Same as above, but signed.
800  */
802  uint8_t *data, uint32_t size, int64_t *num)
803 {
804  uint64_t unum;
805  int res;
806 
807  /* read as unsigned number first */
808  if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
809  return res;
810 
811  /* make signed (weird way) */
812  *num = unum - ((1LL << (7 * res - 1)) - 1);
813 
814  return res;
815 }
816 
817 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
818  EbmlSyntax *syntax, void *data);
819 
820 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
821  uint32_t id, void *data)
822 {
823  int i;
824  for (i = 0; syntax[i].id; i++)
825  if (id == syntax[i].id)
826  break;
827  if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
828  matroska->num_levels > 0 &&
829  matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
830  return 0; // we reached the end of an unknown size cluster
831  if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
832  av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%"PRIX32"\n", id);
833  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
834  return AVERROR_INVALIDDATA;
835  }
836  return ebml_parse_elem(matroska, &syntax[i], data);
837 }
838 
839 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
840  void *data)
841 {
842  if (!matroska->current_id) {
843  uint64_t id;
844  int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
845  if (res < 0)
846  return res;
847  matroska->current_id = id | 1 << 7 * res;
848  }
849  return ebml_parse_id(matroska, syntax, matroska->current_id, data);
850 }
851 
852 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
853  void *data)
854 {
855  int i, res = 0;
856 
857  for (i = 0; syntax[i].id; i++)
858  switch (syntax[i].type) {
859  case EBML_UINT:
860  *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
861  break;
862  case EBML_FLOAT:
863  *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
864  break;
865  case EBML_STR:
866  case EBML_UTF8:
867  // the default may be NULL
868  if (syntax[i].def.s) {
869  uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
870  *dst = av_strdup(syntax[i].def.s);
871  if (!*dst)
872  return AVERROR(ENOMEM);
873  }
874  break;
875  }
876 
877  while (!res && !ebml_level_end(matroska))
878  res = ebml_parse(matroska, syntax, data);
879 
880  return res;
881 }
882 
884  EbmlSyntax *syntax, void *data)
885 {
886  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
887  [EBML_UINT] = 8,
888  [EBML_FLOAT] = 8,
889  // max. 16 MB for strings
890  [EBML_STR] = 0x1000000,
891  [EBML_UTF8] = 0x1000000,
892  // max. 256 MB for binary data
893  [EBML_BIN] = 0x10000000,
894  // no limits for anything else
895  };
896  AVIOContext *pb = matroska->ctx->pb;
897  uint32_t id = syntax->id;
898  uint64_t length;
899  int res;
900 
901  data = (char *) data + syntax->data_offset;
902  if (syntax->list_elem_size) {
903  EbmlList *list = data;
904  if ((res = av_reallocp_array(&list->elem,
905  list->nb_elem + 1,
906  syntax->list_elem_size)) < 0) {
907  list->nb_elem = 0;
908  return res;
909  }
910  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
911  memset(data, 0, syntax->list_elem_size);
912  list->nb_elem++;
913  }
914 
915  if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
916  matroska->current_id = 0;
917  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
918  return res;
919  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
920  av_log(matroska->ctx, AV_LOG_ERROR,
921  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
922  length, max_lengths[syntax->type], syntax->type);
923  return AVERROR_INVALIDDATA;
924  }
925  }
926 
927  switch (syntax->type) {
928  case EBML_UINT:
929  res = ebml_read_uint(pb, length, data);
930  break;
931  case EBML_FLOAT:
932  res = ebml_read_float(pb, length, data);
933  break;
934  case EBML_STR:
935  case EBML_UTF8:
936  res = ebml_read_ascii(pb, length, data);
937  break;
938  case EBML_BIN:
939  res = ebml_read_binary(pb, length, data);
940  break;
941  case EBML_NEST:
942  if ((res = ebml_read_master(matroska, length)) < 0)
943  return res;
944  if (id == MATROSKA_ID_SEGMENT)
945  matroska->segment_start = avio_tell(matroska->ctx->pb);
946  return ebml_parse_nest(matroska, syntax->def.n, data);
947  case EBML_PASS:
948  return ebml_parse_id(matroska, syntax->def.n, id, data);
949  case EBML_STOP:
950  return 1;
951  default:
952  return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
953  }
954  if (res == AVERROR_INVALIDDATA)
955  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
956  else if (res == AVERROR(EIO))
957  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
958  return res;
959 }
960 
961 static void ebml_free(EbmlSyntax *syntax, void *data)
962 {
963  int i, j;
964  for (i = 0; syntax[i].id; i++) {
965  void *data_off = (char *) data + syntax[i].data_offset;
966  switch (syntax[i].type) {
967  case EBML_STR:
968  case EBML_UTF8:
969  av_freep(data_off);
970  break;
971  case EBML_BIN:
972  av_freep(&((EbmlBin *) data_off)->data);
973  break;
974  case EBML_NEST:
975  if (syntax[i].list_elem_size) {
976  EbmlList *list = data_off;
977  char *ptr = list->elem;
978  for (j = 0; j < list->nb_elem;
979  j++, ptr += syntax[i].list_elem_size)
980  ebml_free(syntax[i].def.n, ptr);
981  av_free(list->elem);
982  } else
983  ebml_free(syntax[i].def.n, data_off);
984  default:
985  break;
986  }
987  }
988 }
989 
990 /*
991  * Autodetecting...
992  */
994 {
995  uint64_t total = 0;
996  int len_mask = 0x80, size = 1, n = 1, i;
997 
998  /* EBML header? */
999  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1000  return 0;
1001 
1002  /* length of header */
1003  total = p->buf[4];
1004  while (size <= 8 && !(total & len_mask)) {
1005  size++;
1006  len_mask >>= 1;
1007  }
1008  if (size > 8)
1009  return 0;
1010  total &= (len_mask - 1);
1011  while (n < size)
1012  total = (total << 8) | p->buf[4 + n++];
1013 
1014  /* Does the probe data contain the whole header? */
1015  if (p->buf_size < 4 + size + total)
1016  return 0;
1017 
1018  /* The header should contain a known document type. For now,
1019  * we don't parse the whole header but simply check for the
1020  * availability of that array of characters inside the header.
1021  * Not fully fool-proof, but good enough. */
1022  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1023  int probelen = strlen(matroska_doctypes[i]);
1024  if (total < probelen)
1025  continue;
1026  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1027  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1028  return AVPROBE_SCORE_MAX;
1029  }
1030 
1031  // probably valid EBML header but no recognized doctype
1032  return AVPROBE_SCORE_EXTENSION;
1033 }
1034 
1036  int num)
1037 {
1038  MatroskaTrack *tracks = matroska->tracks.elem;
1039  int i;
1040 
1041  for (i = 0; i < matroska->tracks.nb_elem; i++)
1042  if (tracks[i].num == num)
1043  return &tracks[i];
1044 
1045  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1046  return NULL;
1047 }
1048 
1049 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1050  MatroskaTrack *track)
1051 {
1052  MatroskaTrackEncoding *encodings = track->encodings.elem;
1053  uint8_t *data = *buf;
1054  int isize = *buf_size;
1055  uint8_t *pkt_data = NULL;
1056  uint8_t av_unused *newpktdata;
1057  int pkt_size = isize;
1058  int result = 0;
1059  int olen;
1060 
1061  if (pkt_size >= 10000000)
1062  return AVERROR_INVALIDDATA;
1063 
1064  switch (encodings[0].compression.algo) {
1066  {
1067  int header_size = encodings[0].compression.settings.size;
1068  uint8_t *header = encodings[0].compression.settings.data;
1069 
1070  if (!header_size)
1071  return 0;
1072 
1073  pkt_size = isize + header_size;
1074  pkt_data = av_malloc(pkt_size);
1075  if (!pkt_data)
1076  return AVERROR(ENOMEM);
1077 
1078  memcpy(pkt_data, header, header_size);
1079  memcpy(pkt_data + header_size, data, isize);
1080  break;
1081  }
1082 #if CONFIG_LZO
1084  do {
1085  olen = pkt_size *= 3;
1086  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1087  if (!newpktdata) {
1088  result = AVERROR(ENOMEM);
1089  goto failed;
1090  }
1091  pkt_data = newpktdata;
1092  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1093  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1094  if (result) {
1095  result = AVERROR_INVALIDDATA;
1096  goto failed;
1097  }
1098  pkt_size -= olen;
1099  break;
1100 #endif
1101 #if CONFIG_ZLIB
1103  {
1104  z_stream zstream = { 0 };
1105  if (inflateInit(&zstream) != Z_OK)
1106  return -1;
1107  zstream.next_in = data;
1108  zstream.avail_in = isize;
1109  do {
1110  pkt_size *= 3;
1111  newpktdata = av_realloc(pkt_data, pkt_size);
1112  if (!newpktdata) {
1113  inflateEnd(&zstream);
1114  goto failed;
1115  }
1116  pkt_data = newpktdata;
1117  zstream.avail_out = pkt_size - zstream.total_out;
1118  zstream.next_out = pkt_data + zstream.total_out;
1119  result = inflate(&zstream, Z_NO_FLUSH);
1120  } while (result == Z_OK && pkt_size < 10000000);
1121  pkt_size = zstream.total_out;
1122  inflateEnd(&zstream);
1123  if (result != Z_STREAM_END) {
1124  if (result == Z_MEM_ERROR)
1125  result = AVERROR(ENOMEM);
1126  else
1127  result = AVERROR_INVALIDDATA;
1128  goto failed;
1129  }
1130  break;
1131  }
1132 #endif
1133 #if CONFIG_BZLIB
1135  {
1136  bz_stream bzstream = { 0 };
1137  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1138  return -1;
1139  bzstream.next_in = data;
1140  bzstream.avail_in = isize;
1141  do {
1142  pkt_size *= 3;
1143  newpktdata = av_realloc(pkt_data, pkt_size);
1144  if (!newpktdata) {
1145  BZ2_bzDecompressEnd(&bzstream);
1146  goto failed;
1147  }
1148  pkt_data = newpktdata;
1149  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1150  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1151  result = BZ2_bzDecompress(&bzstream);
1152  } while (result == BZ_OK && pkt_size < 10000000);
1153  pkt_size = bzstream.total_out_lo32;
1154  BZ2_bzDecompressEnd(&bzstream);
1155  if (result != BZ_STREAM_END) {
1156  if (result == BZ_MEM_ERROR)
1157  result = AVERROR(ENOMEM);
1158  else
1159  result = AVERROR_INVALIDDATA;
1160  goto failed;
1161  }
1162  break;
1163  }
1164 #endif
1165  default:
1166  return AVERROR_INVALIDDATA;
1167  }
1168 
1169  *buf = pkt_data;
1170  *buf_size = pkt_size;
1171  return 0;
1172 
1173 failed:
1174  av_free(pkt_data);
1175  return result;
1176 }
1177 
1179  AVPacket *pkt, uint64_t display_duration)
1180 {
1181  AVBufferRef *line;
1182  char *layer, *ptr = pkt->data, *end = ptr + pkt->size;
1183 
1184  for (; *ptr != ',' && ptr < end - 1; ptr++)
1185  ;
1186  if (*ptr == ',')
1187  layer = ++ptr;
1188  for (; *ptr != ',' && ptr < end - 1; ptr++)
1189  ;
1190  if (*ptr == ',') {
1191  int64_t end_pts = pkt->pts + display_duration;
1192  int sc = matroska->time_scale * pkt->pts / 10000000;
1193  int ec = matroska->time_scale * end_pts / 10000000;
1194  int sh, sm, ss, eh, em, es, len;
1195  sh = sc / 360000;
1196  sc -= 360000 * sh;
1197  sm = sc / 6000;
1198  sc -= 6000 * sm;
1199  ss = sc / 100;
1200  sc -= 100 * ss;
1201  eh = ec / 360000;
1202  ec -= 360000 * eh;
1203  em = ec / 6000;
1204  ec -= 6000 * em;
1205  es = ec / 100;
1206  ec -= 100 * es;
1207  *ptr++ = '\0';
1208  len = 50 + end - ptr + FF_INPUT_BUFFER_PADDING_SIZE;
1209  if (!(line = av_buffer_alloc(len)))
1210  return;
1211  snprintf(line->data, len,
1212  "Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1213  layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1214  av_buffer_unref(&pkt->buf);
1215  pkt->buf = line;
1216  pkt->data = line->data;
1217  pkt->size = strlen(line->data);
1218  }
1219 }
1220 
1222 {
1223  int old_size = out->size;
1224  int ret = av_grow_packet(out, in->size);
1225  if (ret < 0)
1226  return ret;
1227 
1228  memcpy(out->data + old_size, in->data, in->size);
1229 
1230  av_free_packet(in);
1231  av_free(in);
1232  return 0;
1233 }
1234 
1236  AVDictionary **metadata, char *prefix)
1237 {
1238  MatroskaTag *tags = list->elem;
1239  char key[1024];
1240  int i;
1241 
1242  for (i = 0; i < list->nb_elem; i++) {
1243  const char *lang = tags[i].lang &&
1244  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1245 
1246  if (!tags[i].name) {
1247  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1248  continue;
1249  }
1250  if (prefix)
1251  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1252  else
1253  av_strlcpy(key, tags[i].name, sizeof(key));
1254  if (tags[i].def || !lang) {
1255  av_dict_set(metadata, key, tags[i].string, 0);
1256  if (tags[i].sub.nb_elem)
1257  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1258  }
1259  if (lang) {
1260  av_strlcat(key, "-", sizeof(key));
1261  av_strlcat(key, lang, sizeof(key));
1262  av_dict_set(metadata, key, tags[i].string, 0);
1263  if (tags[i].sub.nb_elem)
1264  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1265  }
1266  }
1268 }
1269 
1271 {
1272  MatroskaDemuxContext *matroska = s->priv_data;
1273  MatroskaTags *tags = matroska->tags.elem;
1274  int i, j;
1275 
1276  for (i = 0; i < matroska->tags.nb_elem; i++) {
1277  if (tags[i].target.attachuid) {
1278  MatroskaAttachment *attachment = matroska->attachments.elem;
1279  for (j = 0; j < matroska->attachments.nb_elem; j++)
1280  if (attachment[j].uid == tags[i].target.attachuid &&
1281  attachment[j].stream)
1282  matroska_convert_tag(s, &tags[i].tag,
1283  &attachment[j].stream->metadata, NULL);
1284  } else if (tags[i].target.chapteruid) {
1285  MatroskaChapter *chapter = matroska->chapters.elem;
1286  for (j = 0; j < matroska->chapters.nb_elem; j++)
1287  if (chapter[j].uid == tags[i].target.chapteruid &&
1288  chapter[j].chapter)
1289  matroska_convert_tag(s, &tags[i].tag,
1290  &chapter[j].chapter->metadata, NULL);
1291  } else if (tags[i].target.trackuid) {
1292  MatroskaTrack *track = matroska->tracks.elem;
1293  for (j = 0; j < matroska->tracks.nb_elem; j++)
1294  if (track[j].uid == tags[i].target.trackuid && track[j].stream)
1295  matroska_convert_tag(s, &tags[i].tag,
1296  &track[j].stream->metadata, NULL);
1297  } else {
1298  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1299  tags[i].target.type);
1300  }
1301  }
1302 }
1303 
1305  int idx)
1306 {
1307  EbmlList *seekhead_list = &matroska->seekhead;
1308  uint32_t level_up = matroska->level_up;
1309  uint32_t saved_id = matroska->current_id;
1310  MatroskaSeekhead *seekhead = seekhead_list->elem;
1311  int64_t before_pos = avio_tell(matroska->ctx->pb);
1313  int64_t offset;
1314  int ret = 0;
1315 
1316  if (idx >= seekhead_list->nb_elem ||
1317  seekhead[idx].id == MATROSKA_ID_SEEKHEAD ||
1318  seekhead[idx].id == MATROSKA_ID_CLUSTER)
1319  return 0;
1320 
1321  /* seek */
1322  offset = seekhead[idx].pos + matroska->segment_start;
1323  if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1324  /* We don't want to lose our seekhead level, so we add
1325  * a dummy. This is a crude hack. */
1326  if (matroska->num_levels == EBML_MAX_DEPTH) {
1327  av_log(matroska->ctx, AV_LOG_INFO,
1328  "Max EBML element depth (%d) reached, "
1329  "cannot parse further.\n", EBML_MAX_DEPTH);
1330  ret = AVERROR_INVALIDDATA;
1331  } else {
1332  level.start = 0;
1333  level.length = (uint64_t) -1;
1334  matroska->levels[matroska->num_levels] = level;
1335  matroska->num_levels++;
1336  matroska->current_id = 0;
1337 
1338  ret = ebml_parse(matroska, matroska_segment, matroska);
1339 
1340  /* remove dummy level */
1341  while (matroska->num_levels) {
1342  uint64_t length = matroska->levels[--matroska->num_levels].length;
1343  if (length == (uint64_t) -1)
1344  break;
1345  }
1346  }
1347  }
1348  /* seek back */
1349  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1350  matroska->level_up = level_up;
1351  matroska->current_id = saved_id;
1352 
1353  return ret;
1354 }
1355 
1357 {
1358  EbmlList *seekhead_list = &matroska->seekhead;
1359  int64_t before_pos = avio_tell(matroska->ctx->pb);
1360  int i;
1361 
1362  // we should not do any seeking in the streaming case
1363  if (!matroska->ctx->pb->seekable ||
1364  (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1365  return;
1366 
1367  for (i = 0; i < seekhead_list->nb_elem; i++) {
1368  MatroskaSeekhead *seekhead = seekhead_list->elem;
1369  if (seekhead[i].pos <= before_pos)
1370  continue;
1371 
1372  // defer cues parsing until we actually need cue data.
1373  if (seekhead[i].id == MATROSKA_ID_CUES) {
1374  matroska->cues_parsing_deferred = 1;
1375  continue;
1376  }
1377 
1378  if (matroska_parse_seekhead_entry(matroska, i) < 0)
1379  break;
1380  }
1381 }
1382 
1384 {
1385  EbmlList *seekhead_list = &matroska->seekhead;
1386  MatroskaSeekhead *seekhead = seekhead_list->elem;
1387  EbmlList *index_list;
1389  int index_scale = 1;
1390  int i, j;
1391 
1392  for (i = 0; i < seekhead_list->nb_elem; i++)
1393  if (seekhead[i].id == MATROSKA_ID_CUES)
1394  break;
1395  assert(i <= seekhead_list->nb_elem);
1396 
1397  matroska_parse_seekhead_entry(matroska, i);
1398 
1399  index_list = &matroska->index;
1400  index = index_list->elem;
1401  if (index_list->nb_elem &&
1402  index[0].time > 1E14 / matroska->time_scale) {
1403  av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1404  index_scale = matroska->time_scale;
1405  }
1406  for (i = 0; i < index_list->nb_elem; i++) {
1407  EbmlList *pos_list = &index[i].pos;
1408  MatroskaIndexPos *pos = pos_list->elem;
1409  for (j = 0; j < pos_list->nb_elem; j++) {
1410  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1411  pos[j].track);
1412  if (track && track->stream)
1413  av_add_index_entry(track->stream,
1414  pos[j].pos + matroska->segment_start,
1415  index[i].time / index_scale, 0, 0,
1417  }
1418  }
1419 }
1420 
1422 {
1423  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1424  int profile;
1425 
1426  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1427  if (strstr(codec_id, aac_profiles[profile]))
1428  break;
1429  return profile + 1;
1430 }
1431 
1432 static int matroska_aac_sri(int samplerate)
1433 {
1434  int sri;
1435 
1436  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1437  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1438  break;
1439  return sri;
1440 }
1441 
1443  MatroskaTrack *track,
1444  int *offset)
1445 {
1446  AVStream *st = track->stream;
1447  uint8_t *p = track->codec_priv.data;
1448  int size = track->codec_priv.size;
1449 
1450  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1451  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1452  track->codec_priv.size = 0;
1453  return 0;
1454  }
1455  *offset = 8;
1456  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1457 
1458  p += track->codec_priv.size;
1459  size -= track->codec_priv.size;
1460 
1461  /* parse the remaining metadata blocks if present */
1462  while (size >= 4) {
1463  int block_last, block_type, block_size;
1464 
1465  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1466 
1467  p += 4;
1468  size -= 4;
1469  if (block_size > size)
1470  return 0;
1471 
1472  /* check for the channel mask */
1473  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1474  AVDictionary *dict = NULL;
1475  AVDictionaryEntry *chmask;
1476 
1477  ff_vorbis_comment(s, &dict, p, block_size, 0);
1478  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1479  if (chmask) {
1480  uint64_t mask = strtol(chmask->value, NULL, 0);
1481  if (!mask || mask & ~0x3ffffULL) {
1483  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1484  } else
1485  st->codec->channel_layout = mask;
1486  }
1487  av_dict_free(&dict);
1488  }
1489 
1490  p += block_size;
1491  size -= block_size;
1492  }
1493 
1494  return 0;
1495 }
1496 
1498 {
1499  MatroskaDemuxContext *matroska = s->priv_data;
1500  MatroskaTrack *tracks = matroska->tracks.elem;
1501  AVStream *st;
1502  int i, j, ret;
1503 
1504  for (i = 0; i < matroska->tracks.nb_elem; i++) {
1505  MatroskaTrack *track = &tracks[i];
1507  EbmlList *encodings_list = &track->encodings;
1508  MatroskaTrackEncoding *encodings = encodings_list->elem;
1509  uint8_t *extradata = NULL;
1510  int extradata_size = 0;
1511  int extradata_offset = 0;
1512  AVIOContext b;
1513 
1514  /* Apply some sanity checks. */
1515  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1516  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1517  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1518  av_log(matroska->ctx, AV_LOG_INFO,
1519  "Unknown or unsupported track type %"PRIu64"\n",
1520  track->type);
1521  continue;
1522  }
1523  if (!track->codec_id)
1524  continue;
1525 
1526  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1527  if (!track->default_duration && track->video.frame_rate > 0)
1528  track->default_duration = 1000000000 / track->video.frame_rate;
1529  if (!track->video.display_width)
1530  track->video.display_width = track->video.pixel_width;
1531  if (!track->video.display_height)
1532  track->video.display_height = track->video.pixel_height;
1533  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1534  if (!track->audio.out_samplerate)
1535  track->audio.out_samplerate = track->audio.samplerate;
1536  }
1537  if (encodings_list->nb_elem > 1) {
1538  av_log(matroska->ctx, AV_LOG_ERROR,
1539  "Multiple combined encodings not supported");
1540  } else if (encodings_list->nb_elem == 1) {
1541  if (encodings[0].type ||
1542  (
1543 #if CONFIG_ZLIB
1544  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1545 #endif
1546 #if CONFIG_BZLIB
1548 #endif
1549 #if CONFIG_LZO
1551 #endif
1553  encodings[0].scope = 0;
1554  av_log(matroska->ctx, AV_LOG_ERROR,
1555  "Unsupported encoding type");
1556  } else if (track->codec_priv.size && encodings[0].scope & 2) {
1557  uint8_t *codec_priv = track->codec_priv.data;
1558  int ret = matroska_decode_buffer(&track->codec_priv.data,
1559  &track->codec_priv.size,
1560  track);
1561  if (ret < 0) {
1562  track->codec_priv.data = NULL;
1563  track->codec_priv.size = 0;
1564  av_log(matroska->ctx, AV_LOG_ERROR,
1565  "Failed to decode codec private data\n");
1566  }
1567 
1568  if (codec_priv != track->codec_priv.data)
1569  av_free(codec_priv);
1570  }
1571  }
1572 
1573  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1574  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1575  strlen(ff_mkv_codec_tags[j].str))) {
1576  codec_id = ff_mkv_codec_tags[j].id;
1577  break;
1578  }
1579  }
1580 
1581  st = track->stream = avformat_new_stream(s, NULL);
1582  if (!st)
1583  return AVERROR(ENOMEM);
1584 
1585  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1586  track->codec_priv.size >= 40 &&
1587  track->codec_priv.data) {
1588  track->ms_compat = 1;
1589  track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1591  track->video.fourcc);
1592  extradata_offset = 40;
1593  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1594  track->codec_priv.size >= 14 &&
1595  track->codec_priv.data) {
1596  int ret;
1597  ffio_init_context(&b, track->codec_priv.data,
1598  track->codec_priv.size,
1599  0, NULL, NULL, NULL, NULL);
1600  ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
1601  if (ret < 0)
1602  return ret;
1603  codec_id = st->codec->codec_id;
1604  extradata_offset = FFMIN(track->codec_priv.size, 18);
1605  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1606  (track->codec_priv.size >= 86) &&
1607  (track->codec_priv.data)) {
1608  track->video.fourcc = AV_RL32(track->codec_priv.data);
1610  track->video.fourcc);
1611  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1612  switch (track->audio.bitdepth) {
1613  case 8:
1614  codec_id = AV_CODEC_ID_PCM_U8;
1615  break;
1616  case 24:
1617  codec_id = AV_CODEC_ID_PCM_S24BE;
1618  break;
1619  case 32:
1620  codec_id = AV_CODEC_ID_PCM_S32BE;
1621  break;
1622  }
1623  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1624  switch (track->audio.bitdepth) {
1625  case 8:
1626  codec_id = AV_CODEC_ID_PCM_U8;
1627  break;
1628  case 24:
1629  codec_id = AV_CODEC_ID_PCM_S24LE;
1630  break;
1631  case 32:
1632  codec_id = AV_CODEC_ID_PCM_S32LE;
1633  break;
1634  }
1635  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1636  track->audio.bitdepth == 64) {
1637  codec_id = AV_CODEC_ID_PCM_F64LE;
1638  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1639  int profile = matroska_aac_profile(track->codec_id);
1640  int sri = matroska_aac_sri(track->audio.samplerate);
1641  extradata = av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE);
1642  if (!extradata)
1643  return AVERROR(ENOMEM);
1644  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1645  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1646  if (strstr(track->codec_id, "SBR")) {
1647  sri = matroska_aac_sri(track->audio.out_samplerate);
1648  extradata[2] = 0x56;
1649  extradata[3] = 0xE5;
1650  extradata[4] = 0x80 | (sri << 3);
1651  extradata_size = 5;
1652  } else
1653  extradata_size = 2;
1654  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size) {
1655  /* Only ALAC's magic cookie is stored in Matroska's track headers.
1656  * Create the "atom size", "tag", and "tag version" fields the
1657  * decoder expects manually. */
1658  extradata_size = 12 + track->codec_priv.size;
1659  extradata = av_mallocz(extradata_size +
1661  if (!extradata)
1662  return AVERROR(ENOMEM);
1663  AV_WB32(extradata, extradata_size);
1664  memcpy(&extradata[4], "alac", 4);
1665  AV_WB32(&extradata[8], 0);
1666  memcpy(&extradata[12], track->codec_priv.data,
1667  track->codec_priv.size);
1668  } else if (codec_id == AV_CODEC_ID_TTA) {
1669  extradata_size = 30;
1670  extradata = av_mallocz(extradata_size);
1671  if (!extradata)
1672  return AVERROR(ENOMEM);
1673  ffio_init_context(&b, extradata, extradata_size, 1,
1674  NULL, NULL, NULL, NULL);
1675  avio_write(&b, "TTA1", 4);
1676  avio_wl16(&b, 1);
1677  avio_wl16(&b, track->audio.channels);
1678  avio_wl16(&b, track->audio.bitdepth);
1679  avio_wl32(&b, track->audio.out_samplerate);
1680  avio_wl32(&b, matroska->ctx->duration *
1681  track->audio.out_samplerate);
1682  } else if (codec_id == AV_CODEC_ID_RV10 ||
1683  codec_id == AV_CODEC_ID_RV20 ||
1684  codec_id == AV_CODEC_ID_RV30 ||
1685  codec_id == AV_CODEC_ID_RV40) {
1686  extradata_offset = 26;
1687  } else if (codec_id == AV_CODEC_ID_RA_144) {
1688  track->audio.out_samplerate = 8000;
1689  track->audio.channels = 1;
1690  } else if (codec_id == AV_CODEC_ID_RA_288 ||
1691  codec_id == AV_CODEC_ID_COOK ||
1692  codec_id == AV_CODEC_ID_ATRAC3 ||
1693  codec_id == AV_CODEC_ID_SIPR) {
1694  int flavor;
1695  ffio_init_context(&b, track->codec_priv.data,
1696  track->codec_priv.size,
1697  0, NULL, NULL, NULL, NULL);
1698  avio_skip(&b, 22);
1699  flavor = avio_rb16(&b);
1700  track->audio.coded_framesize = avio_rb32(&b);
1701  avio_skip(&b, 12);
1702  track->audio.sub_packet_h = avio_rb16(&b);
1703  track->audio.frame_size = avio_rb16(&b);
1704  track->audio.sub_packet_size = avio_rb16(&b);
1705  if (flavor <= 0 ||
1706  track->audio.coded_framesize <= 0 ||
1707  track->audio.sub_packet_h <= 0 ||
1708  track->audio.frame_size <= 0 ||
1709  track->audio.sub_packet_size <= 0)
1710  return AVERROR_INVALIDDATA;
1711  track->audio.buf = av_malloc(track->audio.frame_size *
1712  track->audio.sub_packet_h);
1713  if (codec_id == AV_CODEC_ID_RA_288) {
1714  st->codec->block_align = track->audio.coded_framesize;
1715  track->codec_priv.size = 0;
1716  } else {
1717  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1718  const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1719  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1720  st->codec->bit_rate = sipr_bit_rate[flavor];
1721  }
1722  st->codec->block_align = track->audio.sub_packet_size;
1723  extradata_offset = 78;
1724  }
1725  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
1726  ret = matroska_parse_flac(s, track, &extradata_offset);
1727  if (ret < 0)
1728  return ret;
1729  }
1730  track->codec_priv.size -= extradata_offset;
1731 
1732  if (codec_id == AV_CODEC_ID_NONE)
1733  av_log(matroska->ctx, AV_LOG_INFO,
1734  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1735 
1736  if (track->time_scale < 0.01)
1737  track->time_scale = 1.0;
1738  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1739  1000 * 1000 * 1000); /* 64 bit pts in ns */
1740 
1741  /* convert the delay from ns to the track timebase */
1742  track->codec_delay = av_rescale_q(track->codec_delay,
1743  (AVRational){ 1, 1000000000 },
1744  st->time_base);
1745 
1746  st->codec->codec_id = codec_id;
1747  st->start_time = 0;
1748  if (strcmp(track->language, "und"))
1749  av_dict_set(&st->metadata, "language", track->language, 0);
1750  av_dict_set(&st->metadata, "title", track->name, 0);
1751 
1752  if (track->flag_default)
1754  if (track->flag_forced)
1756 
1757  if (!st->codec->extradata) {
1758  if (extradata) {
1759  st->codec->extradata = extradata;
1760  st->codec->extradata_size = extradata_size;
1761  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
1762  st->codec->extradata = av_mallocz(track->codec_priv.size +
1764  if (!st->codec->extradata)
1765  return AVERROR(ENOMEM);
1766  st->codec->extradata_size = track->codec_priv.size;
1767  memcpy(st->codec->extradata,
1768  track->codec_priv.data + extradata_offset,
1769  track->codec_priv.size);
1770  }
1771  }
1772 
1773  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1775  st->codec->codec_tag = track->video.fourcc;
1776  st->codec->width = track->video.pixel_width;
1777  st->codec->height = track->video.pixel_height;
1779  &st->sample_aspect_ratio.den,
1780  st->codec->height * track->video.display_width,
1781  st->codec->width * track->video.display_height,
1782  255);
1783  if (st->codec->codec_id != AV_CODEC_ID_H264 &&
1786  if (track->default_duration) {
1788  1000000000, track->default_duration, 30000);
1789  }
1790  // add stream level stereo3d side data if it is a supported format
1792  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
1793  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
1794  if (ret < 0)
1795  return ret;
1796  }
1797  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1799  st->codec->sample_rate = track->audio.out_samplerate;
1800  st->codec->channels = track->audio.channels;
1801  if (st->codec->codec_id != AV_CODEC_ID_AAC)
1803  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1805  if (st->codec->codec_id == AV_CODEC_ID_SSA)
1806  matroska->contains_ssa = 1;
1807  }
1808  }
1809 
1810  return 0;
1811 }
1812 
1814 {
1815  MatroskaDemuxContext *matroska = s->priv_data;
1816  EbmlList *attachments_list = &matroska->attachments;
1817  EbmlList *chapters_list = &matroska->chapters;
1818  MatroskaAttachment *attachments;
1819  MatroskaChapter *chapters;
1820  uint64_t max_start = 0;
1821  int64_t pos;
1822  Ebml ebml = { 0 };
1823  int i, j, res;
1824 
1825  matroska->ctx = s;
1826 
1827  /* First read the EBML header. */
1828  if (ebml_parse(matroska, ebml_syntax, &ebml) ||
1829  ebml.version > EBML_VERSION ||
1830  ebml.max_size > sizeof(uint64_t) ||
1831  ebml.id_length > sizeof(uint32_t) ||
1832  ebml.doctype_version > 3) {
1833  av_log(matroska->ctx, AV_LOG_ERROR,
1834  "EBML header using unsupported features\n"
1835  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1836  ebml.version, ebml.doctype, ebml.doctype_version);
1837  ebml_free(ebml_syntax, &ebml);
1838  return AVERROR_PATCHWELCOME;
1839  }
1840  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1841  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1842  break;
1843  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1844  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1845  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
1846  ebml_free(ebml_syntax, &ebml);
1847  return AVERROR_INVALIDDATA;
1848  }
1849  }
1850  ebml_free(ebml_syntax, &ebml);
1851 
1852  /* The next thing is a segment. */
1853  pos = avio_tell(matroska->ctx->pb);
1854  res = ebml_parse(matroska, matroska_segments, matroska);
1855  // try resyncing until we find a EBML_STOP type element.
1856  while (res != 1) {
1857  res = matroska_resync(matroska, pos);
1858  if (res < 0)
1859  return res;
1860  pos = avio_tell(matroska->ctx->pb);
1861  res = ebml_parse(matroska, matroska_segment, matroska);
1862  }
1863  matroska_execute_seekhead(matroska);
1864 
1865  if (!matroska->time_scale)
1866  matroska->time_scale = 1000000;
1867  if (matroska->duration)
1868  matroska->ctx->duration = matroska->duration * matroska->time_scale *
1869  1000 / AV_TIME_BASE;
1870  av_dict_set(&s->metadata, "title", matroska->title, 0);
1871 
1872  res = matroska_parse_tracks(s);
1873  if (res < 0)
1874  return res;
1875 
1876  attachments = attachments_list->elem;
1877  for (j = 0; j < attachments_list->nb_elem; j++) {
1878  if (!(attachments[j].filename && attachments[j].mime &&
1879  attachments[j].bin.data && attachments[j].bin.size > 0)) {
1880  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1881  } else {
1882  AVStream *st = avformat_new_stream(s, NULL);
1883  if (!st)
1884  break;
1885  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
1886  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
1889  st->codec->extradata = av_malloc(attachments[j].bin.size);
1890  if (!st->codec->extradata)
1891  break;
1892  st->codec->extradata_size = attachments[j].bin.size;
1893  memcpy(st->codec->extradata, attachments[j].bin.data,
1894  attachments[j].bin.size);
1895 
1896  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
1897  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
1898  strlen(ff_mkv_mime_tags[i].str))) {
1899  st->codec->codec_id = ff_mkv_mime_tags[i].id;
1900  break;
1901  }
1902  }
1903  attachments[j].stream = st;
1904  }
1905  }
1906 
1907  chapters = chapters_list->elem;
1908  for (i = 0; i < chapters_list->nb_elem; i++)
1909  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
1910  (max_start == 0 || chapters[i].start > max_start)) {
1911  chapters[i].chapter =
1912  avpriv_new_chapter(s, chapters[i].uid,
1913  (AVRational) { 1, 1000000000 },
1914  chapters[i].start, chapters[i].end,
1915  chapters[i].title);
1916  av_dict_set(&chapters[i].chapter->metadata,
1917  "title", chapters[i].title, 0);
1918  max_start = chapters[i].start;
1919  }
1920 
1922 
1923  return 0;
1924 }
1925 
1926 /*
1927  * Put one packet in an application-supplied AVPacket struct.
1928  * Returns 0 on success or -1 on failure.
1929  */
1931  AVPacket *pkt)
1932 {
1933  if (matroska->num_packets > 0) {
1934  memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1935  av_free(matroska->packets[0]);
1936  if (matroska->num_packets > 1) {
1937  void *newpackets;
1938  memmove(&matroska->packets[0], &matroska->packets[1],
1939  (matroska->num_packets - 1) * sizeof(AVPacket *));
1940  newpackets = av_realloc(matroska->packets,
1941  (matroska->num_packets - 1) *
1942  sizeof(AVPacket *));
1943  if (newpackets)
1944  matroska->packets = newpackets;
1945  } else {
1946  av_freep(&matroska->packets);
1947  matroska->prev_pkt = NULL;
1948  }
1949  matroska->num_packets--;
1950  return 0;
1951  }
1952 
1953  return -1;
1954 }
1955 
1956 /*
1957  * Free all packets in our internal queue.
1958  */
1960 {
1961  matroska->prev_pkt = NULL;
1962  if (matroska->packets) {
1963  int n;
1964  for (n = 0; n < matroska->num_packets; n++) {
1965  av_free_packet(matroska->packets[n]);
1966  av_free(matroska->packets[n]);
1967  }
1968  av_freep(&matroska->packets);
1969  matroska->num_packets = 0;
1970  }
1971 }
1972 
1974  int *buf_size, int type,
1975  uint32_t **lace_buf, int *laces)
1976 {
1977  int res = 0, n, size = *buf_size;
1978  uint8_t *data = *buf;
1979  uint32_t *lace_size;
1980 
1981  if (!type) {
1982  *laces = 1;
1983  *lace_buf = av_mallocz(sizeof(int));
1984  if (!*lace_buf)
1985  return AVERROR(ENOMEM);
1986 
1987  *lace_buf[0] = size;
1988  return 0;
1989  }
1990 
1991  assert(size > 0);
1992  *laces = *data + 1;
1993  data += 1;
1994  size -= 1;
1995  lace_size = av_mallocz(*laces * sizeof(int));
1996  if (!lace_size)
1997  return AVERROR(ENOMEM);
1998 
1999  switch (type) {
2000  case 0x1: /* Xiph lacing */
2001  {
2002  uint8_t temp;
2003  uint32_t total = 0;
2004  for (n = 0; res == 0 && n < *laces - 1; n++) {
2005  while (1) {
2006  if (size == 0) {
2007  res = AVERROR_EOF;
2008  break;
2009  }
2010  temp = *data;
2011  lace_size[n] += temp;
2012  data += 1;
2013  size -= 1;
2014  if (temp != 0xff)
2015  break;
2016  }
2017  total += lace_size[n];
2018  }
2019  if (size <= total) {
2020  res = AVERROR_INVALIDDATA;
2021  break;
2022  }
2023 
2024  lace_size[n] = size - total;
2025  break;
2026  }
2027 
2028  case 0x2: /* fixed-size lacing */
2029  if (size % (*laces)) {
2030  res = AVERROR_INVALIDDATA;
2031  break;
2032  }
2033  for (n = 0; n < *laces; n++)
2034  lace_size[n] = size / *laces;
2035  break;
2036 
2037  case 0x3: /* EBML lacing */
2038  {
2039  uint64_t num;
2040  uint64_t total;
2041  n = matroska_ebmlnum_uint(matroska, data, size, &num);
2042  if (n < 0) {
2043  av_log(matroska->ctx, AV_LOG_INFO,
2044  "EBML block data error\n");
2045  res = n;
2046  break;
2047  }
2048  data += n;
2049  size -= n;
2050  total = lace_size[0] = num;
2051  for (n = 1; res == 0 && n < *laces - 1; n++) {
2052  int64_t snum;
2053  int r;
2054  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2055  if (r < 0) {
2056  av_log(matroska->ctx, AV_LOG_INFO,
2057  "EBML block data error\n");
2058  res = r;
2059  break;
2060  }
2061  data += r;
2062  size -= r;
2063  lace_size[n] = lace_size[n - 1] + snum;
2064  total += lace_size[n];
2065  }
2066  if (size <= total) {
2067  res = AVERROR_INVALIDDATA;
2068  break;
2069  }
2070  lace_size[*laces - 1] = size - total;
2071  break;
2072  }
2073  }
2074 
2075  *buf = data;
2076  *lace_buf = lace_size;
2077  *buf_size = size;
2078 
2079  return res;
2080 }
2081 
2083  MatroskaTrack *track, AVStream *st,
2084  uint8_t *data, int size, uint64_t timecode,
2085  uint64_t duration, int64_t pos)
2086 {
2087  int a = st->codec->block_align;
2088  int sps = track->audio.sub_packet_size;
2089  int cfs = track->audio.coded_framesize;
2090  int h = track->audio.sub_packet_h;
2091  int y = track->audio.sub_packet_cnt;
2092  int w = track->audio.frame_size;
2093  int x;
2094 
2095  if (!track->audio.pkt_cnt) {
2096  if (track->audio.sub_packet_cnt == 0)
2097  track->audio.buf_timecode = timecode;
2098  if (st->codec->codec_id == AV_CODEC_ID_RA_288) {
2099  if (size < cfs * h / 2) {
2100  av_log(matroska->ctx, AV_LOG_ERROR,
2101  "Corrupt int4 RM-style audio packet size\n");
2102  return AVERROR_INVALIDDATA;
2103  }
2104  for (x = 0; x < h / 2; x++)
2105  memcpy(track->audio.buf + x * 2 * w + y * cfs,
2106  data + x * cfs, cfs);
2107  } else if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
2108  if (size < w) {
2109  av_log(matroska->ctx, AV_LOG_ERROR,
2110  "Corrupt sipr RM-style audio packet size\n");
2111  return AVERROR_INVALIDDATA;
2112  }
2113  memcpy(track->audio.buf + y * w, data, w);
2114  } else {
2115  if (size < sps * w / sps) {
2116  av_log(matroska->ctx, AV_LOG_ERROR,
2117  "Corrupt generic RM-style audio packet size\n");
2118  return AVERROR_INVALIDDATA;
2119  }
2120  for (x = 0; x < w / sps; x++)
2121  memcpy(track->audio.buf +
2122  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2123  data + x * sps, sps);
2124  }
2125 
2126  if (++track->audio.sub_packet_cnt >= h) {
2127  if (st->codec->codec_id == AV_CODEC_ID_SIPR)
2128  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2129  track->audio.sub_packet_cnt = 0;
2130  track->audio.pkt_cnt = h * w / a;
2131  }
2132  }
2133 
2134  while (track->audio.pkt_cnt) {
2135  AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2136  av_new_packet(pkt, a);
2137  memcpy(pkt->data,
2138  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2139  a);
2140  pkt->pts = track->audio.buf_timecode;
2142  pkt->pos = pos;
2143  pkt->stream_index = st->index;
2144  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2145  }
2146 
2147  return 0;
2148 }
2149 
2150 /* reconstruct full wavpack blocks from mangled matroska ones */
2152  uint8_t **pdst, int *size)
2153 {
2154  uint8_t *dst = NULL;
2155  int dstlen = 0;
2156  int srclen = *size;
2157  uint32_t samples;
2158  uint16_t ver;
2159  int ret, offset = 0;
2160 
2161  if (srclen < 12 || track->stream->codec->extradata_size < 2)
2162  return AVERROR_INVALIDDATA;
2163 
2164  ver = AV_RL16(track->stream->codec->extradata);
2165 
2166  samples = AV_RL32(src);
2167  src += 4;
2168  srclen -= 4;
2169 
2170  while (srclen >= 8) {
2171  int multiblock;
2172  uint32_t blocksize;
2173  uint8_t *tmp;
2174 
2175  uint32_t flags = AV_RL32(src);
2176  uint32_t crc = AV_RL32(src + 4);
2177  src += 8;
2178  srclen -= 8;
2179 
2180  multiblock = (flags & 0x1800) != 0x1800;
2181  if (multiblock) {
2182  if (srclen < 4) {
2183  ret = AVERROR_INVALIDDATA;
2184  goto fail;
2185  }
2186  blocksize = AV_RL32(src);
2187  src += 4;
2188  srclen -= 4;
2189  } else
2190  blocksize = srclen;
2191 
2192  if (blocksize > srclen) {
2193  ret = AVERROR_INVALIDDATA;
2194  goto fail;
2195  }
2196 
2197  tmp = av_realloc(dst, dstlen + blocksize + 32);
2198  if (!tmp) {
2199  ret = AVERROR(ENOMEM);
2200  goto fail;
2201  }
2202  dst = tmp;
2203  dstlen += blocksize + 32;
2204 
2205  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2206  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2207  AV_WL16(dst + offset + 8, ver); // version
2208  AV_WL16(dst + offset + 10, 0); // track/index_no
2209  AV_WL32(dst + offset + 12, 0); // total samples
2210  AV_WL32(dst + offset + 16, 0); // block index
2211  AV_WL32(dst + offset + 20, samples); // number of samples
2212  AV_WL32(dst + offset + 24, flags); // flags
2213  AV_WL32(dst + offset + 28, crc); // crc
2214  memcpy(dst + offset + 32, src, blocksize); // block data
2215 
2216  src += blocksize;
2217  srclen -= blocksize;
2218  offset += blocksize + 32;
2219  }
2220 
2221  *pdst = dst;
2222  *size = dstlen;
2223 
2224  return 0;
2225 
2226 fail:
2227  av_freep(&dst);
2228  return ret;
2229 }
2230 
2232  MatroskaTrack *track, AVStream *st,
2233  uint8_t *data, int pkt_size,
2234  uint64_t timecode, uint64_t duration,
2235  int64_t pos, int is_keyframe)
2236 {
2237  MatroskaTrackEncoding *encodings = track->encodings.elem;
2238  uint8_t *pkt_data = data;
2239  int offset = 0, res;
2240  AVPacket *pkt;
2241 
2242  if (encodings && encodings->scope & 1) {
2243  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2244  if (res < 0)
2245  return res;
2246  }
2247 
2248  if (st->codec->codec_id == AV_CODEC_ID_WAVPACK) {
2249  uint8_t *wv_data;
2250  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2251  if (res < 0) {
2252  av_log(matroska->ctx, AV_LOG_ERROR,
2253  "Error parsing a wavpack block.\n");
2254  goto fail;
2255  }
2256  if (pkt_data != data)
2257  av_freep(&pkt_data);
2258  pkt_data = wv_data;
2259  }
2260 
2261  if (st->codec->codec_id == AV_CODEC_ID_PRORES)
2262  offset = 8;
2263 
2264  pkt = av_mallocz(sizeof(AVPacket));
2265  /* XXX: prevent data copy... */
2266  if (av_new_packet(pkt, pkt_size + offset) < 0) {
2267  av_free(pkt);
2268  return AVERROR(ENOMEM);
2269  }
2270 
2271  if (st->codec->codec_id == AV_CODEC_ID_PRORES) {
2272  uint8_t *buf = pkt->data;
2273  bytestream_put_be32(&buf, pkt_size);
2274  bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2275  }
2276 
2277  memcpy(pkt->data + offset, pkt_data, pkt_size);
2278 
2279  if (pkt_data != data)
2280  av_free(pkt_data);
2281 
2282  pkt->flags = is_keyframe;
2283  pkt->stream_index = st->index;
2284 
2285  if (track->ms_compat)
2286  pkt->dts = timecode;
2287  else
2288  pkt->pts = timecode;
2289  pkt->pos = pos;
2290  if (st->codec->codec_id == AV_CODEC_ID_TEXT)
2292  else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
2293  pkt->duration = duration;
2294 
2295  if (st->codec->codec_id == AV_CODEC_ID_SSA)
2296  matroska_fix_ass_packet(matroska, pkt, duration);
2297 
2298  if (matroska->prev_pkt &&
2299  timecode != AV_NOPTS_VALUE &&
2300  matroska->prev_pkt->pts == timecode &&
2301  matroska->prev_pkt->stream_index == st->index &&
2302  st->codec->codec_id == AV_CODEC_ID_SSA)
2303  matroska_merge_packets(matroska->prev_pkt, pkt);
2304  else {
2305  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2306  matroska->prev_pkt = pkt;
2307  }
2308 
2309  return 0;
2310 
2311 fail:
2312  if (pkt_data != data)
2313  av_freep(&pkt_data);
2314  return res;
2315 }
2316 
2318  int size, int64_t pos, uint64_t cluster_time,
2319  uint64_t block_duration, int is_keyframe,
2320  int64_t cluster_pos)
2321 {
2322  uint64_t timecode = AV_NOPTS_VALUE;
2323  MatroskaTrack *track;
2324  int res = 0;
2325  AVStream *st;
2326  int16_t block_time;
2327  uint32_t *lace_size = NULL;
2328  int n, flags, laces = 0;
2329  uint64_t num, duration;
2330 
2331  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2332  av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2333  return n;
2334  }
2335  data += n;
2336  size -= n;
2337 
2338  track = matroska_find_track_by_num(matroska, num);
2339  if (!track || !track->stream) {
2340  av_log(matroska->ctx, AV_LOG_INFO,
2341  "Invalid stream %"PRIu64" or size %u\n", num, size);
2342  return AVERROR_INVALIDDATA;
2343  } else if (size <= 3)
2344  return 0;
2345  st = track->stream;
2346  if (st->discard >= AVDISCARD_ALL)
2347  return res;
2348 
2349  block_time = AV_RB16(data);
2350  data += 2;
2351  flags = *data++;
2352  size -= 3;
2353  if (is_keyframe == -1)
2354  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2355 
2356  if (cluster_time != (uint64_t) -1 &&
2357  (block_time >= 0 || cluster_time >= -block_time)) {
2358  timecode = cluster_time + block_time - track->codec_delay;
2359  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2360  timecode < track->end_timecode)
2361  is_keyframe = 0; /* overlapping subtitles are not key frame */
2362  if (is_keyframe)
2363  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2365  }
2366 
2367  if (matroska->skip_to_keyframe &&
2368  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2369  if (!is_keyframe || timecode < matroska->skip_to_timecode)
2370  return res;
2371  matroska->skip_to_keyframe = 0;
2372  }
2373 
2374  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2375  &lace_size, &laces);
2376 
2377  if (res)
2378  goto end;
2379 
2380  if (block_duration != AV_NOPTS_VALUE) {
2381  duration = block_duration / laces;
2382  if (block_duration != duration * laces) {
2383  av_log(matroska->ctx, AV_LOG_WARNING,
2384  "Incorrect block_duration, possibly corrupted container");
2385  }
2386  } else {
2387  duration = track->default_duration / matroska->time_scale;
2388  block_duration = duration * laces;
2389  }
2390 
2391  if (timecode != AV_NOPTS_VALUE)
2392  track->end_timecode =
2393  FFMAX(track->end_timecode, timecode + block_duration);
2394 
2395  for (n = 0; n < laces; n++) {
2396  if ((st->codec->codec_id == AV_CODEC_ID_RA_288 ||
2397  st->codec->codec_id == AV_CODEC_ID_COOK ||
2398  st->codec->codec_id == AV_CODEC_ID_SIPR ||
2399  st->codec->codec_id == AV_CODEC_ID_ATRAC3) &&
2400  st->codec->block_align && track->audio.sub_packet_size) {
2401  res = matroska_parse_rm_audio(matroska, track, st, data,
2402  lace_size[n],
2403  timecode, duration, pos);
2404  if (res)
2405  goto end;
2406  } else {
2407  res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2408  timecode, duration, pos,
2409  !n ? is_keyframe : 0);
2410  if (res)
2411  goto end;
2412  }
2413 
2414  if (timecode != AV_NOPTS_VALUE)
2415  timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
2416  data += lace_size[n];
2417  }
2418 
2419 end:
2420  av_free(lace_size);
2421  return res;
2422 }
2423 
2425 {
2426  EbmlList *blocks_list;
2427  MatroskaBlock *blocks;
2428  int i, res;
2429  res = ebml_parse(matroska,
2430  matroska_cluster_incremental_parsing,
2431  &matroska->current_cluster);
2432  if (res == 1) {
2433  /* New Cluster */
2434  if (matroska->current_cluster_pos)
2435  ebml_level_end(matroska);
2436  ebml_free(matroska_cluster, &matroska->current_cluster);
2437  memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2438  matroska->current_cluster_num_blocks = 0;
2439  matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2440  matroska->prev_pkt = NULL;
2441  /* sizeof the ID which was already read */
2442  if (matroska->current_id)
2443  matroska->current_cluster_pos -= 4;
2444  res = ebml_parse(matroska,
2445  matroska_clusters_incremental,
2446  &matroska->current_cluster);
2447  /* Try parsing the block again. */
2448  if (res == 1)
2449  res = ebml_parse(matroska,
2450  matroska_cluster_incremental_parsing,
2451  &matroska->current_cluster);
2452  }
2453 
2454  if (!res &&
2455  matroska->current_cluster_num_blocks <
2456  matroska->current_cluster.blocks.nb_elem) {
2457  blocks_list = &matroska->current_cluster.blocks;
2458  blocks = blocks_list->elem;
2459 
2460  matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2461  i = blocks_list->nb_elem - 1;
2462  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2463  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2464  if (!blocks[i].non_simple)
2465  blocks[i].duration = AV_NOPTS_VALUE;
2466  res = matroska_parse_block(matroska, blocks[i].bin.data,
2467  blocks[i].bin.size, blocks[i].bin.pos,
2468  matroska->current_cluster.timecode,
2469  blocks[i].duration, is_keyframe,
2470  matroska->current_cluster_pos);
2471  }
2472  }
2473 
2474  if (res < 0)
2475  matroska->done = 1;
2476  return res;
2477 }
2478 
2480 {
2481  MatroskaCluster cluster = { 0 };
2482  EbmlList *blocks_list;
2483  MatroskaBlock *blocks;
2484  int i, res;
2485  int64_t pos;
2486 
2487  if (!matroska->contains_ssa)
2488  return matroska_parse_cluster_incremental(matroska);
2489  pos = avio_tell(matroska->ctx->pb);
2490  matroska->prev_pkt = NULL;
2491  if (matroska->current_id)
2492  pos -= 4; /* sizeof the ID which was already read */
2493  res = ebml_parse(matroska, matroska_clusters, &cluster);
2494  blocks_list = &cluster.blocks;
2495  blocks = blocks_list->elem;
2496  for (i = 0; i < blocks_list->nb_elem && !res; i++)
2497  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2498  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2499  if (!blocks[i].non_simple)
2500  blocks[i].duration = AV_NOPTS_VALUE;
2501  res = matroska_parse_block(matroska, blocks[i].bin.data,
2502  blocks[i].bin.size, blocks[i].bin.pos,
2503  cluster.timecode, blocks[i].duration,
2504  is_keyframe, pos);
2505  }
2506  ebml_free(matroska_cluster, &cluster);
2507  return res;
2508 }
2509 
2511 {
2512  MatroskaDemuxContext *matroska = s->priv_data;
2513  int ret = 0;
2514 
2515  while (!ret && matroska_deliver_packet(matroska, pkt)) {
2516  int64_t pos = avio_tell(matroska->ctx->pb);
2517  if (matroska->done)
2518  return AVERROR_EOF;
2519  if (matroska_parse_cluster(matroska) < 0)
2520  ret = matroska_resync(matroska, pos);
2521  }
2522 
2523  if (ret == AVERROR_INVALIDDATA && pkt->data) {
2524  pkt->flags |= AV_PKT_FLAG_CORRUPT;
2525  return 0;
2526  }
2527 
2528  return ret;
2529 }
2530 
2531 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2532  int64_t timestamp, int flags)
2533 {
2534  MatroskaDemuxContext *matroska = s->priv_data;
2535  MatroskaTrack *tracks = matroska->tracks.elem;
2536  AVStream *st = s->streams[stream_index];
2537  int i, index, index_sub, index_min;
2538 
2539  /* Parse the CUES now since we need the index data to seek. */
2540  if (matroska->cues_parsing_deferred) {
2541  matroska_parse_cues(matroska);
2542  matroska->cues_parsing_deferred = 0;
2543  }
2544 
2545  if (!st->nb_index_entries)
2546  return 0;
2547  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2548 
2549  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2550  avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
2551  SEEK_SET);
2552  matroska->current_id = 0;
2553  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2554  matroska_clear_queue(matroska);
2555  if (matroska_parse_cluster(matroska) < 0)
2556  break;
2557  }
2558  }
2559 
2560  matroska_clear_queue(matroska);
2561  if (index < 0)
2562  return 0;
2563 
2564  index_min = index;
2565  for (i = 0; i < matroska->tracks.nb_elem; i++) {
2566  tracks[i].audio.pkt_cnt = 0;
2567  tracks[i].audio.sub_packet_cnt = 0;
2568  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2569  tracks[i].end_timecode = 0;
2570  if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2571  tracks[i].stream->discard != AVDISCARD_ALL) {
2572  index_sub = av_index_search_timestamp(
2573  tracks[i].stream, st->index_entries[index].timestamp,
2575  if (index_sub >= 0 &&
2576  st->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
2577  st->index_entries[index].timestamp -
2578  st->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
2579  index_min = index_sub;
2580  }
2581  }
2582 
2583  avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2584  matroska->current_id = 0;
2585  matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2586  matroska->skip_to_timecode = st->index_entries[index].timestamp;
2587  matroska->done = 0;
2588  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2589  return 0;
2590 }
2591 
2593 {
2594  MatroskaDemuxContext *matroska = s->priv_data;
2595  MatroskaTrack *tracks = matroska->tracks.elem;
2596  int n;
2597 
2598  matroska_clear_queue(matroska);
2599 
2600  for (n = 0; n < matroska->tracks.nb_elem; n++)
2601  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2602  av_free(tracks[n].audio.buf);
2603  ebml_free(matroska_cluster, &matroska->current_cluster);
2604  ebml_free(matroska_segment, matroska);
2605 
2606  return 0;
2607 }
2608 
2610  .name = "matroska,webm",
2611  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
2612  .extensions = "mkv,mk3d,mka,mks",
2613  .priv_data_size = sizeof(MatroskaDemuxContext),
2619  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
2620 };
const char * s
Definition: matroskadec.c:84
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:1609
static EbmlSyntax matroska_simpletag[]
Definition: matroskadec.c:452
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
#define MATROSKA_ID_TRACKDEFAULTDURATION
Definition: matroska.h:98
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:336
static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, int idx)
Definition: matroskadec.c:1304
Bytestream IO Context.
Definition: avio.h:68
#define MATROSKA_ID_VIDEOFLAGINTERLACED
Definition: matroska.h:115
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
static void matroska_convert_tags(AVFormatContext *s)
Definition: matroskadec.c:1270
#define MATROSKA_ID_DATEUTC
Definition: matroska.h:71
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:106
int size
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:243
uint64_t type
Definition: matroskadec.c:149
#define MATROSKA_ID_TRACKFLAGLACING
Definition: matroska.h:95
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:1930
#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:107
uint64_t version
Definition: matroskadec.c:101
AVInputFormat ff_matroska_demuxer
Definition: matroskadec.c:2609
static int is_keyframe(NalUnitType naltype)
Definition: libx265.c:47
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: utils.c:1181
enum AVCodecID id
Definition: mxfenc.c:84
#define MATROSKA_ID_CUETRACKPOSITION
Definition: matroska.h:140
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:1943
#define MATROSKA_ID_CODECPRIVATE
Definition: matroska.h:84
const unsigned char ff_sipr_subpk_size[4]
Definition: rmsipr.c:25
#define MATROSKA_ID_TAGTARGETS_TYPE
Definition: matroska.h:156
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:129
static int ebml_level_end(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:605
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:998
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num)
Definition: matroskadec.c:801
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:2829
int64_t pos
Definition: avformat.h:660
#define MATROSKA_ID_ENCODINGTYPE
Definition: matroska.h:130
#define MATROSKA_ID_AUDIOBITDEPTH
Definition: matroska.h:124
uint64_t chapteruid
Definition: matroskadec.c:208
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:1611
static av_always_inline float av_int2float(uint32_t i)
Reinterpret a 32-bit integer as a float.
Definition: intfloat.h:40
#define MATROSKA_ID_TRACKFLAGDEFAULT
Definition: matroska.h:93
EbmlList tag
Definition: matroskadec.c:214
#define CONFIG_ZLIB
Definition: config.h:339
uint64_t uid
Definition: matroskadec.c:148
static EbmlSyntax matroska_segments[]
Definition: matroskadec.c:505
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
MatroskaCluster current_cluster
Definition: matroskadec.c:270
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:769
#define MATROSKA_ID_TAGTARGETS_ATTACHUID
Definition: matroska.h:160
int num
numerator
Definition: rational.h:44
int index
stream index in AVFormatContext
Definition: avformat.h:700
int size
Definition: avcodec.h:974
#define MATROSKA_ID_CLUSTERPOSITION
Definition: matroska.h:171
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:186
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:187
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:878
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:179
uint64_t flag_forced
Definition: matroskadec.c:157
uint64_t max_size
Definition: matroskadec.c:102
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
#define MATROSKA_ID_TRACKTYPE
Definition: matroska.h:80
#define MATROSKA_ID_TAGTARGETS_CHAPTERUID
Definition: matroska.h:159
#define AV_RL16
Definition: intreadwrite.h:42
uint64_t flag_default
Definition: matroskadec.c:156
#define MATROSKA_ID_VIDEOASPECTRATIO
Definition: matroska.h:117
#define MATROSKA_ID_MUXINGAPP
Definition: matroska.h:70
#define MATROSKA_ID_AUDIOCHANNELS
Definition: matroska.h:125
char * name
Definition: matroskadec.c:197
#define FF_ARRAY_ELEMS(a)
discard all
Definition: avcodec.h:568
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:237
static EbmlSyntax matroska_track_audio[]
Definition: matroskadec.c:328
#define MATROSKA_ID_CUECLUSTERPOSITION
Definition: matroska.h:144
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:580
MatroskaTrackAudio audio
Definition: matroskadec.c:159
uint64_t duration
Definition: matroskadec.c:277
const struct EbmlSyntax * n
Definition: matroskadec.c:85
#define CONFIG_LZO
Definition: config.h:371
#define MATROSKA_ID_EDITIONFLAGDEFAULT
Definition: matroska.h:200
#define MATROSKA_ID_CLUSTERTIMECODE
Definition: matroska.h:170
#define EBML_ID_DOCTYPE
Definition: matroska.h:40
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:1828
static EbmlSyntax matroska_tag[]
Definition: matroskadec.c:471
static EbmlSyntax matroska_attachment[]
Definition: matroskadec.c:388
#define MATROSKA_ID_CHAPTERTIMEEND
Definition: matroska.h:194
static int64_t duration
Definition: avplay.c:246
static EbmlSyntax matroska_track[]
Definition: matroskadec.c:355
#define MATROSKA_ID_TRACKCONTENTENCODINGS
Definition: matroska.h:99
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:198
#define AV_LZO_OUTPUT_FULL
decoded data did not fit into output buffer
Definition: lzo.h:39
AVChapter * avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
Add a new chapter.
Definition: utils.c:2601
#define EBML_VERSION
Definition: matroska.h:30
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:184
Format I/O context.
Definition: avformat.h:922
#define EBML_ID_CRC32
Definition: matroska.h:46
uint64_t def
Definition: matroskadec.c:200
void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
Update cur_dts of all streams based on the given timestamp and AVStream.
Definition: utils.c:1104
#define MATROSKA_ID_TRACKCONTENTENCODING
Definition: matroska.h:100
#define MATROSKA_ID_CODECDOWNLOADURL
Definition: matroska.h:87
int64_t end_timecode
Definition: matroskadec.c:164
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1035
Public dictionary API.
uint64_t pixel_height
Definition: matroskadec.c:124
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:260
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
uint8_t
#define MATROSKA_ID_CHAPLANG
Definition: matroska.h:197
uint64_t stereo_mode
Definition: matroskadec.c:126
MatroskaTrackVideo video
Definition: matroskadec.c:158
#define MATROSKA_ID_EDITIONFLAGORDERED
Definition: matroska.h:201
void * elem
Definition: matroskadec.c:91
#define MATROSKA_ID_TRACKLANGUAGE
Definition: matroska.h:91
#define AV_WB32(p, d)
Definition: intreadwrite.h:239
MatroskaTrackCompression compression
Definition: matroskadec.c:116
uint8_t * data
Definition: matroskadec.c:96
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:69
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:595
uint64_t time
Definition: matroskadec.c:192
#define AV_RB32
Definition: intreadwrite.h:130
int ff_mkv_stereo3d_conv(AVStream *st, MatroskaVideoStereoModeType stereo_mode)
Definition: matroska.c:109
#define MATROSKA_ID_VIDEOPIXELCROPT
Definition: matroska.h:111
#define MATROSKA_ID_TIMECODESCALE
Definition: matroska.h:66
static int matroska_aac_sri(int samplerate)
Definition: matroskadec.c:1432
enum AVStreamParseType need_parsing
Definition: avformat.h:867
#define b
Definition: input.c:52
#define MATROSKA_ID_SIMPLEBLOCK
Definition: matroska.h:174
#define MATROSKA_ID_TAGTARGETS_TYPEVALUE
Definition: matroska.h:157
#define AV_WL32(p, d)
Definition: intreadwrite.h:255
#define MATROSKA_ID_EDITIONFLAGHIDDEN
Definition: matroska.h:199
#define AV_LZO_OUTPUT_PADDING
Definition: lzo.h:47
static EbmlSyntax matroska_cluster[]
Definition: matroskadec.c:520
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1164
const char * name
AVStream * stream
Definition: matroskadec.c:174
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2521
#define MATROSKA_ID_CODECNAME
Definition: matroska.h:85
char * language
Definition: matroskadec.c:153
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:990
static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, int size, int64_t pos, uint64_t cluster_time, uint64_t block_duration, int is_keyframe, int64_t cluster_pos)
Definition: matroskadec.c:2317
#define MATROSKA_ID_AUDIOOUTSAMPLINGFREQ
Definition: matroska.h:122
const char data[16]
Definition: mxf.c:70
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:38
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1033
uint8_t * data
Definition: avcodec.h:973
uint64_t typevalue
Definition: matroskadec.c:206
uint64_t codec_delay
Definition: matroskadec.c:161
static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2424
#define MATROSKA_ID_VIDEODISPLAYWIDTH
Definition: matroska.h:106
#define MATROSKA_ID_EDITIONUID
Definition: matroska.h:198
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
static int flags
Definition: log.c:44
uint32_t tag
Definition: movenc.c:844
static EbmlSyntax ebml_header[]
Definition: matroskadec.c:283
#define AVERROR_EOF
End of file.
Definition: error.h:51
#define MATROSKA_ID_CODECDECODEALL
Definition: matroska.h:88
enum AVCodecID id
Definition: internal.h:42
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
const uint8_t ff_log2_tab[256]
Definition: log2_tab.c:21
static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska, AVPacket *pkt, uint64_t display_duration)
Definition: matroskadec.c:1178
#define MATROSKA_ID_CUES
Definition: matroska.h:58
#define EBML_MAX_DEPTH
Definition: matroska.h:253
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:660
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:219
#define MATROSKA_ID_TRACKNUMBER
Definition: matroska.h:78
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:165
int duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:991
#define MATROSKA_ID_SEGMENTUID
Definition: matroska.h:72
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:452
static EbmlSyntax matroska_tracks[]
Definition: matroskadec.c:383
EbmlList sub
Definition: matroskadec.c:201
#define r
Definition: input.c:51
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1019
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:2479
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:852
#define MATROSKA_ID_CUEBLOCKNUMBER
Definition: matroska.h:145
#define MATROSKA_ID_TRACKUID
Definition: matroska.h:79
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:129
uint64_t display_height
Definition: matroskadec.c:122
static EbmlSyntax matroska_info[]
Definition: matroskadec.c:299
#define MATROSKA_ID_ENCODINGORDER
Definition: matroska.h:128
#define MATROSKA_ID_VIDEOSTEREOMODE
Definition: matroska.h:116
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:81
#define AVINDEX_KEYFRAME
Definition: avformat.h:662
EbmlType type
Definition: matroskadec.c:78
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:167
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:105
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1130
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:186
#define MATROSKA_ID_BLOCKDURATION
Definition: matroska.h:178
#define EBML_ID_EBMLREADVERSION
Definition: matroska.h:37
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:1222
static const uint16_t mask[17]
Definition: lzw.c:38
FLAC (Free Lossless Audio Codec) decoder/demuxer common functions.
static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb, uint64_t *number)
Read a EBML length value.
Definition: matroskadec.c:674
#define AV_RB16
Definition: intreadwrite.h:53
AVChapter * chapter
Definition: matroskadec.c:183
#define AVERROR(e)
Definition: error.h:43
static EbmlSyntax matroska_index[]
Definition: matroskadec.c:447
int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
Definition: riffdec.c:78
int64_t timestamp
Definition: avformat.h:661
#define MATROSKA_ID_CLUSTER
Definition: matroska.h:62
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:150
#define MATROSKA_ID_FILEMIMETYPE
Definition: matroska.h:186
static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, uint64_t *num)
Definition: matroskadec.c:790
int64_t convergence_duration
Time difference in AVStream->time_base units from the pts of this packet to the point at which the ou...
Definition: avcodec.h:1017
uint64_t display_width
Definition: matroskadec.c:121
#define MATROSKA_ID_WRITINGAPP
Definition: matroska.h:69
static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int size, uint64_t timecode, uint64_t duration, int64_t pos)
Definition: matroskadec.c:2082
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:170
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:956
#define MATROSKA_ID_TAGDEFAULT_BUG
Definition: matroska.h:154
Definition: graph2dot.c:49
static EbmlSyntax matroska_clusters[]
Definition: matroskadec.c:529
static EbmlSyntax matroska_chapter[]
Definition: matroskadec.c:420
enum AVCodecID id
Definition: matroska.h:249
#define MATROSKA_ID_VIDEOPIXELCROPR
Definition: matroska.h:113
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:168
#define MATROSKA_ID_ENCODINGCOMPSETTINGS
Definition: matroska.h:133
#define EBML_ID_EBMLMAXIDLENGTH
Definition: matroska.h:38
#define MATROSKA_ID_CHAPTERFLAGHIDDEN
Definition: matroska.h:203
enum AVCodecID codec_id
Definition: mov_chan.c:432
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:780
uint64_t timecode
Definition: matroskadec.c:228
#define FFMAX(a, b)
Definition: common.h:55
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:81
static EbmlSyntax matroska_attachments[]
Definition: matroskadec.c:397
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:979
static EbmlSyntax matroska_cluster_incremental_parsing[]
Definition: matroskadec.c:538
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1852
Only parse headers, do not repack.
Definition: avformat.h:654
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:443
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:718
static void ebml_free(EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:961
const CodecMime ff_mkv_mime_tags[]
Definition: matroska.c:91
int nb_elem
Definition: matroskadec.c:90
#define MATROSKA_ID_TAG
Definition: matroska.h:148
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:398
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:397
char * lang
Definition: matroskadec.c:199
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:680
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:531
static EbmlSyntax matroska_chapters[]
Definition: matroskadec.c:429
uint64_t skip_to_timecode
Definition: matroskadec.c:263
Definition: dct-test.c:50
static int matroska_read_header(AVFormatContext *s)
Definition: matroskadec.c:1813
static void matroska_parse_cues(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1383
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:117
int bit_rate
the average bitrate
Definition: avcodec.h:1114
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1356
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:64
uint64_t start
Definition: matroskadec.c:178
#define EBML_ID_EBMLVERSION
Definition: matroska.h:36
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:234
#define FFMIN(a, b)
Definition: common.h:57
#define MATROSKA_ID_TAGTARGETS
Definition: matroska.h:155
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:29
AVPacket ** packets
Definition: matroskadec.c:255
#define MATROSKA_ID_TAGNAME
Definition: matroska.h:150
union EbmlSyntax::@108 def
#define MATROSKA_ID_TRACKTIMECODESCALE
Definition: matroska.h:101
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
#define CONFIG_BZLIB
Definition: config.h:303
static int ebml_parse_elem(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:883
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, int max_size, uint64_t *number)
Definition: matroskadec.c:628
int width
picture width / height.
Definition: avcodec.h:1224
#define MATROSKA_ID_CHAPTERFLAGENABLED
Definition: matroska.h:204
uint64_t id_length
Definition: matroskadec.c:103
static EbmlSyntax matroska_track_encodings[]
Definition: matroskadec.c:350
static MatroskaTrack * matroska_find_track_by_num(MatroskaDemuxContext *matroska, int num)
Definition: matroskadec.c:1035
static av_always_inline int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: avio.h:210
#define MATROSKA_ID_SIMPLETAG
Definition: matroska.h:149
uint64_t doctype_version
Definition: matroskadec.c:105
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
static EbmlSyntax matroska_track_encoding[]
Definition: matroskadec.c:342
#define MATROSKA_ID_TRACKMAXCACHE
Definition: matroska.h:97
int data_offset
Definition: matroskadec.c:80
#define MATROSKA_ID_CHAPTERPHYSEQUIV
Definition: matroska.h:205
static int matroska_read_close(AVFormatContext *s)
Definition: matroskadec.c:2592
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
EbmlBin codec_priv
Definition: matroskadec.c:152
static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
Definition: matroskadec.c:724
static int matroska_decode_buffer(uint8_t **buf, int *buf_size, MatroskaTrack *track)
Definition: matroskadec.c:1049
#define MATROSKA_ID_CHAPTERATOM
Definition: matroska.h:192
#define AV_RL32
Definition: intreadwrite.h:146
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
Definition: lzo.c:134
#define AV_EF_EXPLODE
Definition: avcodec.h:2417
AVDictionary * metadata
Definition: avformat.h:771
Opaque data information usually sparse.
Definition: avutil.h:191
#define MATROSKA_ID_VIDEOCOLORSPACE
Definition: matroska.h:118
static EbmlSyntax matroska_segment[]
Definition: matroskadec.c:493
#define MATROSKA_ID_CHAPTERS
Definition: matroska.h:63
static int matroska_probe(AVProbeData *p)
Definition: matroskadec.c:993
#define EBML_ID_VOID
Definition: matroska.h:45
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list, AVDictionary **metadata, char *prefix)
Definition: matroskadec.c:1235
#define MATROSKA_ID_AUDIOSAMPLINGFREQ
Definition: matroska.h:121
double f
Definition: matroskadec.c:83
#define MATROSKA_ID_TRACKMINCACHE
Definition: matroska.h:96
static int matroska_parse_flac(AVFormatContext *s, MatroskaTrack *track, int *offset)
Definition: matroskadec.c:1442
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:544
if(ac->has_optimized_func)
static int matroska_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: matroskadec.c:2531
static EbmlSyntax matroska_seekhead[]
Definition: matroskadec.c:488
Stream structure.
Definition: avformat.h:699
static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src, uint8_t **pdst, int *size)
Definition: matroskadec.c:2151
#define AVERROR_PATCHWELCOME
Not yet implemented in Libav, patches welcome.
Definition: error.h:57
NULL
Definition: eval.c:55
EbmlList encodings
Definition: matroskadec.c:160
char * codec_id
Definition: matroskadec.c:151
#define AV_DISPOSITION_DEFAULT
Definition: avformat.h:668
int64_t current_cluster_pos
Definition: matroskadec.c:269
#define MATROSKA_ID_VIDEOPIXELCROPB
Definition: matroska.h:110
#define AV_LOG_INFO
Standard information.
Definition: log.h:134
static int matroska_parse_tracks(AVFormatContext *s)
Definition: matroskadec.c:1497
#define MATROSKA_ID_TRACKFLAGFORCED
Definition: matroska.h:94
#define MATROSKA_ID_TAGS
Definition: matroska.h:59
enum AVMediaType codec_type
Definition: avcodec.h:1058
version
Definition: ffv1enc.c:1080
static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
Definition: matroskadec.c:768
enum AVCodecID codec_id
Definition: avcodec.h:1067
#define MATROSKA_ID_TAGDEFAULT
Definition: matroska.h:153
#define MATROSKA_ID_SEEKID
Definition: matroska.h:166
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:213
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:66
int sample_rate
samples per second
Definition: avcodec.h:1791
AVIOContext * pb
I/O context.
Definition: avformat.h:964
#define MATROSKA_ID_ENCODINGCOMPALGO
Definition: matroska.h:132
#define MATROSKA_ID_BLOCK
Definition: matroska.h:177
#define MATROSKA_ID_INFO
Definition: matroska.h:56
#define MATROSKA_ID_TAGTARGETS_TRACKUID
Definition: matroska.h:158
uint8_t * data
The data buffer.
Definition: buffer.h:89
#define MATROSKA_ID_TAGLANG
Definition: matroska.h:152
static EbmlSyntax matroska_tags[]
Definition: matroskadec.c:477
uint64_t pixel_width
Definition: matroskadec.c:123
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1082
#define MATROSKA_ID_TRACKFLAGENABLED
Definition: matroska.h:92
#define MATROSKA_ID_TRACKS
Definition: matroska.h:57
int extradata_size
Definition: avcodec.h:1165
#define MATROSKA_ID_TRACKNAME
Definition: matroska.h:90
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: libcdio.c:114
uint64_t start
Definition: matroskadec.c:223
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:68
static EbmlSyntax matroska_cluster_incremental[]
Definition: matroskadec.c:552
int nb_index_entries
Definition: avformat.h:880
#define MATROSKA_ID_SEEKENTRY
Definition: matroska.h:163
EbmlList pos
Definition: matroskadec.c:193
uint64_t u
Definition: matroskadec.c:82
#define MATROSKA_ID_EDITIONENTRY
Definition: matroska.h:191
int index
Definition: gxfenc.c:72
#define MATROSKA_ID_BLOCKGROUP
Definition: matroska.h:173
#define MATROSKA_ID_VIDEOPIXELHEIGHT
Definition: matroska.h:109
rational number numerator/denominator
Definition: rational.h:43
AVStream * stream
Definition: matroskadec.c:163
static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf, int *buf_size, int type, uint32_t **lace_buf, int *laces)
Definition: matroskadec.c:1973
#define MATROSKA_ID_CUETIME
Definition: matroska.h:139
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:2510
static EbmlSyntax matroska_blockgroup[]
Definition: matroskadec.c:510
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:839
static av_always_inline void flac_parse_block_header(const uint8_t *block_header, int *last, int *type, int *size)
Parse the metadata block parameters from the header.
Definition: flac.h:143
#define MATROSKA_ID_TITLE
Definition: matroska.h:68
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:402
AVFormatContext * ctx
Definition: matroskadec.c:233
#define MATROSKA_ID_TRACKVIDEO
Definition: matroska.h:82
int size
Definition: matroskadec.c:95
int error
contains the error code or 0 if no error happened
Definition: avio.h:102
This structure contains the data a format has to probe a file.
Definition: avformat.h:395
static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, uint32_t id, void *data)
Definition: matroskadec.c:820
int list_elem_size
Definition: matroskadec.c:79
static EbmlSyntax ebml_syntax[]
Definition: matroskadec.c:294
size_t av_strlcat(char *dst, const char *src, size_t size)
Append the string src to the string dst, but to a total length of no more than size - 1 bytes...
Definition: avstring.c:91
#define MATROSKA_ID_VIDEOFRAMERATE
Definition: matroska.h:105
#define MATROSKA_ID_ATTACHMENTS
Definition: matroska.h:61
int64_t pos
Definition: matroskadec.c:97
#define MATROSKA_ID_CHAPTERDISPLAY
Definition: matroska.h:195
uint8_t level
Definition: svq3.c:147
#define MATROSKA_ID_FILENAME
Definition: matroska.h:185
const int avpriv_mpeg4audio_sample_rates[16]
Definition: mpeg4audio.c:55
const AVMetadataConv ff_mkv_metadata_conv[]
Definition: matroska.c:103
#define MATROSKA_ID_CODECID
Definition: matroska.h:83
static EbmlSyntax matroska_clusters_incremental[]
Definition: matroskadec.c:561
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:404
A reference to a data buffer.
Definition: buffer.h:81
int64_t reference
Definition: matroskadec.c:278
void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize)
Perform 4-bit block reordering for SIPR data.
Definition: rmsipr.c:41
Main libavformat public API header.
uint64_t buf_timecode
Definition: matroskadec.c:142
uint64_t num
Definition: matroskadec.c:147
#define MATROSKA_ID_CUETRACK
Definition: matroska.h:143
static EbmlSyntax matroska_track_encoding_compression[]
Definition: matroskadec.c:336
EbmlType
Definition: matroskadec.c:63
#define MATROSKA_ID_SEEKPOSITION
Definition: matroska.h:167
static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
Definition: matroskadec.c:572
#define MATROSKA_ID_CODECDELAY
Definition: matroska.h:89
#define MATROSKA_ID_CHAPTERTIMESTART
Definition: matroska.h:193
double time_scale
Definition: matroskadec.c:154
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:70
void * av_realloc(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:117
raw UTF-8 text
Definition: avcodec.h:452
char * string
Definition: matroskadec.c:198
int64_t start_time
Decoding: pts of the first frame of the stream, in stream time base.
Definition: avformat.h:749
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1152
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:760
char * doctype
Definition: matroskadec.c:104
static EbmlSyntax matroska_seekhead_entry[]
Definition: matroskadec.c:482
int av_grow_packet(AVPacket *pkt, int grow_by)
Increase packet size, correctly zeroing padding.
Definition: avpacket.c:109
int den
denominator
Definition: rational.h:45
#define MATROSKA_ID_SEGMENT
Definition: matroska.h:53
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1020
uint32_t id
Definition: matroskadec.c:77
static EbmlSyntax matroska_tagtargets[]
Definition: matroskadec.c:462
MatroskaTagTarget target
Definition: matroskadec.c:213
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
#define MKBETAG(a, b, c, d)
Definition: common.h:239
#define MATROSKA_ID_SEEKHEAD
Definition: matroska.h:60
#define EBML_ID_HEADER
Definition: matroska.h:33
#define MATROSKA_ID_ENCODINGCOMPRESSION
Definition: matroska.h:131
#define MATROSKA_ID_CLUSTERPREVSIZE
Definition: matroska.h:172
char * value
Definition: dict.h:76
int eof_reached
true if eof reached
Definition: avio.h:96
#define MATROSKA_ID_POINTENTRY
Definition: matroska.h:136
int len
int channels
number of audio channels
Definition: avcodec.h:1792
#define MATROSKA_ID_FILEUID
Definition: matroska.h:188
#define MATROSKA_ID_VIDEOPIXELCROPL
Definition: matroska.h:112
void * priv_data
Format private data.
Definition: avformat.h:950
uint64_t non_simple
Definition: matroskadec.c:279
#define MATROSKA_ID_CHAPTERUID
Definition: matroska.h:202
static EbmlSyntax matroska_index_entry[]
Definition: matroskadec.c:441
static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
Definition: matroskadec.c:747
#define MATROSKA_ID_VIDEODISPLAYUNIT
Definition: matroska.h:114
static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
Definition: matroskadec.c:687
#define MATROSKA_ID_TRACKMAXBLKADDID
Definition: matroska.h:102
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:972
#define EBML_ID_EBMLMAXSIZELENGTH
Definition: matroska.h:39
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1017
#define MATROSKA_ID_CHAPSTRING
Definition: matroska.h:196
static int matroska_merge_packets(AVPacket *out, AVPacket *in)
Definition: matroskadec.c:1221
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:525
#define MATROSKA_ID_TAGSTRING
Definition: matroska.h:151
static EbmlSyntax matroska_index_pos[]
Definition: matroskadec.c:434
static int ebml_read_float(AVIOContext *pb, int size, double *num)
Definition: matroskadec.c:706
#define MATROSKA_ID_DURATION
Definition: matroska.h:67
uint64_t length
Definition: matroskadec.c:224
#define AV_WL16(p, d)
Definition: intreadwrite.h:225
static int matroska_aac_profile(char *codec_id)
Definition: matroskadec.c:1421
int stream_index
Definition: avcodec.h:975
#define EBML_ID_DOCTYPEVERSION
Definition: matroska.h:41
static void matroska_clear_queue(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1959
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:741
static EbmlSyntax matroska_chapter_entry[]
Definition: matroskadec.c:408
uint8_t bitdepth
Definition: dirac.c:83
#define MKTAG(a, b, c, d)
Definition: common.h:238
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:762
#define MATROSKA_ID_ATTACHEDFILE
Definition: matroska.h:183
EbmlList blocks
Definition: matroskadec.c:229
This structure stores compressed data.
Definition: avcodec.h:950
static EbmlSyntax matroska_chapter_display[]
Definition: matroskadec.c:402
#define MATROSKA_ID_CODECSTATE
Definition: matroska.h:180
uint64_t default_duration
Definition: matroskadec.c:155
static int matroska_parse_frame(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int pkt_size, uint64_t timecode, uint64_t duration, int64_t pos, int is_keyframe)
Definition: matroskadec.c:2231
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:205
#define MATROSKA_ID_CODECINFOURL
Definition: matroska.h:86
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:966
#define MATROSKA_ID_VIDEOPIXELWIDTH
Definition: matroska.h:108
#define MATROSKA_ID_TRACKAUDIO
Definition: matroska.h:81
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:228
#define av_unused
Definition: attributes.h:86
#define MATROSKA_ID_ENCODINGSCOPE
Definition: matroska.h:129
const CodecTags ff_mkv_codec_tags[]
Definition: matroska.c:26
static const char *const matroska_doctypes[]
Definition: matroskadec.c:570
static EbmlSyntax matroska_track_video[]
Definition: matroskadec.c:310
uint64_t attachuid
Definition: matroskadec.c:209